About NFPA

Free Access

  • Free Access

From FireRescue1.com

« Requesting backup: NFPA Journal underscores the importance of emergency power systems | Main | News reports: Nightclub fire in Brazil kills hundreds »



Feed You can follow this conversation by subscribing to the comment feed for this post.

Derek Duval

Venkateswara Bhamidipati,

Thank you for your comment. You can review the preliminary draft and follow along with the development of this new standard here www.nfpa.org/652. You second question seems to be more geared toward the ASTM testing and not the NFPA standard. You can also submit any comments you have to the development of this document starting in September.

Venkateswara Sarma Bhamidipati

1 We should clearly work out a way to classify combustible dusts and non combustible dust with addtional information. Not just Kst/Pmax alone. For eg. Milk Powder and Sulfur have same range of Kst/PMax. Is it justified? May be new class which takes into account of MIE also?

2. What is the reason for using Chemical Igniters as against Electric arc in ASTM-1226.

Can this test be used in using A/B explosion classification (like in ATEX draft std)? does that use electric spark?

We have seen that commercial Kst test labs use 2 x 5 KJ chemical in 20 Lt vessel. Is it not overdriving the results?

Why they do not use electrical arc and if this helps in ruling out some dusts as non-combustible and exclude as B class

We should also highlight and distinguish the differences between electric arc/chemical igniters in triggering explosion

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.


Post a comment

Your Information

(Name is required. Email address will not be displayed with the comment.)

Enter your e-mail address to receive updates from this blog.


  • The views expressed on this blog reflect the personal opinion of the individual author and do not necessarily represent the views or policies of NFPA, its technical committees, or other constituent parts. Use of this blog is subject to NFPA's Terms of Use and Content Disclaimers.